Close #2629. Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>
Some commands don't accept arguments, but users try giving them and don't notice a mistake. It's a bit more user-friendly to tell the user that there is something wrong with the way he tries to use the command.
Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>